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Solved
Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...
mer än 12 år ago
Solved
Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...
mer än 12 år ago
Solved
Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...
mer än 12 år ago
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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...
mer än 12 år ago
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radius of a spherical planet
you just measured its surface area, that is the input.
mer än 12 år ago
Solved
Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];
mer än 12 år ago
Solved
Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12
mer än 12 år ago
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Back to basics 21 - Matrix replicating
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix, generate an output matrix that consists o...
mer än 12 år ago
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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...
mer än 12 år ago
Solved
Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...
mer än 12 år ago
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Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...
mer än 12 år ago
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Back to basics 15 - classes
Covering some basic topics I haven't seen elsewhere on Cody. Return the class of the input variable.
mer än 12 år ago
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So many choices
For inputs _n_ and _k_ (in that order), output the number of ways that k objects can be chosen from amongst n distinct objects. ...
mer än 12 år ago
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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...
mer än 12 år ago
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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...
mer än 12 år ago
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Wrapping the Tower of Pisa
The famous artist Christo Vladimirov Javacheff, who likes pizza, wants to wrap the well-known Italian tower in paper. It is a ci...
mer än 12 år ago
Solved
Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...
mer än 12 år ago
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Try 1.5.4: Celsius to Fahrenheit
Write a program to convert an input given in Celsius to Fahrenheit. Examples: Input celsiusValue = 100 Output fahrValu...
mer än 12 år ago
Solved
Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...
mer än 12 år ago
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Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...
mer än 12 år ago
Solved
Determine if input is odd
Given the input n, return true if n is odd or false if n is even.
mer än 12 år ago
Solved
Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...
mer än 12 år ago
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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...
mer än 12 år ago
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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
mer än 12 år ago
Solved
Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...
mer än 12 år ago
Solved
Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...
mer än 12 år ago
Solved
Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...
mer än 12 år ago
Solved
Matrix which contains the values of an other matrix A at the given locations.
If you have two matrices, which together give xc and yc coordinates into another matrix, eg : xc = [1 1 1; 2 2 1]; ...
mer än 12 år ago
